Can I Use 75W140 Instead Of 75W85 – The Ultimate Axle Protection Guide
Using 75W-140 gear oil instead of the recommended 75W-85 is a common modification, but it’s not a simple “yes” or “no” answer. While the thicker 75W-140 offers superior protection for vehicles under heavy load—like towing or intense off-roading—it can reduce fuel efficiency and cause sluggish performance in cold weather for a standard daily driver. Your…